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Sky Ridge railroad cut, Hawleyville, Newtown, Fairfield County, Connecticut, USAi
Regional Level Types
Sky Ridge railroad cut- not defined -
HawleyvilleVillage
Newtown- not defined -
Fairfield CountyCounty
ConnecticutState
USACountry

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PhotosMapsSearch
Latitude & Longitude (WGS84):
41° 25' 35'' North , 73° 21' 36'' West
Latitude & Longitude (decimal):
41.42639,-73.36000
GeoHash:
G#: dr7gdtkyh
GRN:
N28W40
KΓΆppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Newtown1,967 (2017)4.9km
Bethel9,549 (2017)7.6km
Danbury84,657 (2017)8.6km
New Fairfield14,126 (2017)11.4km
Heritage Village3,736 (2017)12.1km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Danbury Mineralogical SocietyDanbury, Connecticut9km
New Haven Mineral ClubNew Haven, Connecticut38km
Bristol Gem & Mineral ClubBristol, Connecticut44km
Stamford Mineralogical SocietyStamford, Connecticut44km
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut48km
Mindat Locality ID:
213270
Long-form identifier:
mindat:1:2:213270:2
GUID (UUID V4):
95121172-a681-40e7-917a-336cf7d84bad


A prominent railroad cut on the New York and New England Railroad line through Sky Ridge near Hawleyville (Lapham, 1957) where "pegmatites" of clinochlore and epidote with orthoclase, albite and quartz bordered by muscovite are embedded in diorite. An alteration zone of pink orthoclase surrounds the pegmatites. Pectolite, stilbite and apophyllite formed in fractures.

Note: This is an active railroad line.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


22 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

β“˜ Albite
Formula: Na(AlSi3O8)
Habit: massive
Colour: white to very pale green
Description: fine to coarse grained
β“˜ 'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Habit: fibrous
Colour: very pale green
β“˜ 'Amphibole Supergroup var. Byssolite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Habit: fibrous
Colour: very pale green
β“˜ 'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
β“˜ 'Apophyllite Group'
Formula: AB4[Si8O22]X · 8H2O
Habit: prismatic with pinacoid terminations
Colour: white
Description: Small crystals with pectolite and stilbite in fractures in the gneiss.
β“˜ Calcite ?
Formula: CaCO3
Description: Reference provides no details
β“˜ Chalcopyrite ?
Formula: CuFeS2
Description: Reference provides no details.
β“˜ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Habit: compact granular masses
Colour: dark green
Description: found in a clinochlore-apatite-orthoclase pegmatite along nearly horizontal fracture planes of a medium to coarse-grained diorite, it reportedly contains a small amount of Mn. Referred to in these old references as "prochlorite".
β“˜ Copiapite ?
Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Description: Reference provides no details and also questions its presence.
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Habit: radiating, elongated, striated prisms
Colour: colorless, straw-yellow, brownish yellow, yellowish green, pistachio green
Description: found in a clinochlore-apatite-orthoclase pegmatite along nearly horizontal fracture planes of a medium to coarse-grained diorite, crystals reach to at least 10 cm
β“˜ Fluorapatite
Formula: Ca5(PO4)3F
Habit: short hexagonal prisms
Colour: pale green
Fluorescence: yellow
Description: At least one specimen formerly in the Januzzi collection has a group of parallel crystals 17mm long.
β“˜ Galena ?
Formula: PbS
Description: Reference provides no details.
β“˜ 'Garnet Group'
Formula: X3Z2(SiO4)3
Colour: red
Description: Tiny subhedral crystals in albite matrix.
β“˜ Gypsum ?
Formula: CaSO4 · 2H2O
Description: Reference provides no details. Could be an alteration product of pyrite.
β“˜ Heulandite-Ca ?
Formula: (Ca,Na)5(Si27Al9)O72 · 26H2O
Description: Reference provides only a list of minerals with no details.
β“˜ Melanterite ?
Formula: Fe2+(H2O)6SO4 · H2O
Description: Reference provides no details.
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: compact books
Colour: brown to greenish
Description: found along the simple feldspar-quartz pegmatite borders
β“˜ Natrolite ?
Formula: Na2Al2Si3O10 · 2H2O
Description: Reference provides no details, could be confused with pectolite.
β“˜ Opal ?
Formula: SiO2 · nH2O
Description: Reference provides no details.
β“˜ Opal var. Opal-AN ?
Formula: SiO2 · nH2O
Description: Reference provides no details.
β“˜ Orthoclase
Formula: K(AlSi3O8)
Colour: pink
Description: in the transition zone bordering the epidote-clinochlore pegmatite, color reportedly due to tiny hematite inclusions
β“˜ Pectolite
Formula: NaCa2Si3O8(OH)
Habit: acicular
Colour: white
Description: Radiating aggregates in fractures in gneiss.
β“˜ Pyrite ?
Formula: FeS2
Description: Reference provides no details.
β“˜ 'Pyroxene Group' ?
Formula: ADSi2O6
Description: Reference provides no details.
β“˜ Pyrrhotite ?
Formula: Fe1-xS
Description: Reference provides no details.
β“˜ Quartz
Formula: SiO2
Description: massive in the pegmatites, "and a few, elongated milky quartz crystals" in a clinochlore matrix (Lapham 1956)
β“˜ Rutile
Formula: TiO2
Habit: twinned, reticulated, plates
Colour: gray to brown
Description: Thin plates made up of a 2-D reticulated, twinned, elongated prisms. Plates typically a few cm across.
β“˜ Staurolite ?
Formula: Fe2+2Al9Si4O23(OH)
Description: Reference provides no details.
β“˜ 'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
Habit: radiating, flat prisms with pinacoidal terminations
Colour: white, colorless
Description: Thin coatings of radiating crystals formed along many of the vertical fractures. Micro crystals with pectolite and apophyllite in fractures in the gneiss.
β“˜ Titanite
Formula: CaTi(SiO4)O
Colour: pale brown
Description: Micro crystals in albite matrix.
β“˜ Zoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Description: Listed by Januzzi (1976) as questionable. Lapham (1957) determined the epidote group minerals found here are all epidote.

Gallery:

AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2β“˜ 'Amphibole Supergroup var. Byssolite'
(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)β“˜ Epidote
NaCa2Si3O8(OH)β“˜ Pectolite
TiO2β“˜ Rutile

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜Chalcopyrite ?2.CB.10aCuFeS2
β“˜Pyrrhotite ?2.CC.10Fe1-xS
β“˜Galena ?2.CD.10PbS
β“˜Pyrite ?2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
β“˜Opal
var. Opal-AN ?		4.DA.10SiO2 Β· nH2O
β“˜ ?4.DA.10SiO2 Β· nH2O
β“˜Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
β“˜Calcite ?5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Melanterite ?7.CB.35Fe2+(H2O)6SO4 Β· H2O
β“˜Gypsum ?7.CD.40CaSO4 Β· 2H2O
β“˜Copiapite ?7.DB.35Fe2+Fe3+4(SO4)6(OH)2 Β· 20H2O
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
β“˜Staurolite ?9.AF.30Fe2+2Al9Si4O23(OH)
β“˜Titanite9.AG.15CaTi(SiO4)O
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Zoisite ?9.BG.10(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
β“˜Pectolite9.DG.05NaCa2Si3O8(OH)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
β“˜Orthoclase9.FA.30K(AlSi3O8)
β“˜Albite9.FA.35Na(AlSi3O8)
β“˜Natrolite ?9.GA.05Na2Al2Si3O10 Β· 2H2O
β“˜Heulandite-Ca ?9.GE.05(Ca,Na)5(Si27Al9)O72 Β· 26H2O
Unclassified
β“˜'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
β“˜'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] Β· nH2O
β“˜'Apophyllite Group'-AB4[Si8O22]X Β· 8H2O
β“˜'Pyroxene Group' ?-ADSi2O6
β“˜'Garnet Group'-X3Z2(SiO4)3
β“˜'Amphibole Supergroup
var. Byssolite'		-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
β“˜'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
Hβ“˜ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hβ“˜ Apophyllite GroupAB4[Si8O22]X · 8H2O
Hβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Hβ“˜ CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ GypsumCaSO4 · 2H2O
Hβ“˜ Opal var. Opal-ANSiO2 · nH2O
Hβ“˜ MelanteriteFe2+(H2O)6SO4 · H2O
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Hβ“˜ OpalSiO2 · nH2O
Hβ“˜ PectoliteNaCa2Si3O8(OH)
Hβ“˜ StauroliteFe22+Al9Si4O23(OH)
Hβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Hβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hβ“˜ Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Hβ“˜ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
Cβ“˜ CalciteCaCO3
OOxygen
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oβ“˜ Apophyllite GroupAB4[Si8O22]X · 8H2O
Oβ“˜ CalciteCaCO3
Oβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Oβ“˜ CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ FluorapatiteCa5(PO4)3F
Oβ“˜ GypsumCaSO4 · 2H2O
Oβ“˜ Opal var. Opal-ANSiO2 · nH2O
Oβ“˜ MelanteriteFe2+(H2O)6SO4 · H2O
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Oβ“˜ OpalSiO2 · nH2O
Oβ“˜ OrthoclaseK(AlSi3O8)
Oβ“˜ PectoliteNaCa2Si3O8(OH)
Oβ“˜ QuartzSiO2
Oβ“˜ RutileTiO2
Oβ“˜ StauroliteFe22+Al9Si4O23(OH)
Oβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Oβ“˜ TitaniteCaTi(SiO4)O
Oβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oβ“˜ Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Oβ“˜ Pyroxene GroupADSi2O6
Oβ“˜ Garnet GroupX3Z2(SiO4)3
Oβ“˜ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
Fβ“˜ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Fβ“˜ FluorapatiteCa5(PO4)3F
Fβ“˜ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Fβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Naβ“˜ PectoliteNaCa2Si3O8(OH)
Naβ“˜ Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
MgMagnesium
Mgβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Alβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Alβ“˜ OrthoclaseK(AlSi3O8)
Alβ“˜ StauroliteFe22+Al9Si4O23(OH)
Alβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Alβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alβ“˜ Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Alβ“˜ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Siβ“˜ Apophyllite GroupAB4[Si8O22]X · 8H2O
Siβ“˜ ClinochloreMg5Al(AlSi3O10)(OH)8
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ Opal var. Opal-ANSiO2 · nH2O
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ NatroliteNa2Al2Si3O10 · 2H2O
Siβ“˜ OpalSiO2 · nH2O
Siβ“˜ OrthoclaseK(AlSi3O8)
Siβ“˜ PectoliteNaCa2Si3O8(OH)
Siβ“˜ QuartzSiO2
Siβ“˜ StauroliteFe22+Al9Si4O23(OH)
Siβ“˜ Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Siβ“˜ TitaniteCaTi(SiO4)O
Siβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siβ“˜ Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Siβ“˜ Pyroxene GroupADSi2O6
Siβ“˜ Garnet GroupX3Z2(SiO4)3
Siβ“˜ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
PPhosphorus
Pβ“˜ FluorapatiteCa5(PO4)3F
Pβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
Sβ“˜ ChalcopyriteCuFeS2
Sβ“˜ CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Sβ“˜ GalenaPbS
Sβ“˜ GypsumCaSO4 · 2H2O
Sβ“˜ MelanteriteFe2+(H2O)6SO4 · H2O
Sβ“˜ PyriteFeS2
Sβ“˜ PyrrhotiteFe1-xS
ClChlorine
Clβ“˜ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Clβ“˜ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Clβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Kβ“˜ OrthoclaseK(AlSi3O8)
CaCalcium
Caβ“˜ CalciteCaCO3
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ FluorapatiteCa5(PO4)3F
Caβ“˜ GypsumCaSO4 · 2H2O
Caβ“˜ PectoliteNaCa2Si3O8(OH)
Caβ“˜ TitaniteCaTi(SiO4)O
Caβ“˜ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caβ“˜ Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Caβ“˜ ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Tiβ“˜ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Tiβ“˜ RutileTiO2
Tiβ“˜ TitaniteCaTi(SiO4)O
Tiβ“˜ Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Feβ“˜ ChalcopyriteCuFeS2
Feβ“˜ CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ MelanteriteFe2+(H2O)6SO4 · H2O
Feβ“˜ PyriteFeS2
Feβ“˜ PyrrhotiteFe1-xS
Feβ“˜ StauroliteFe22+Al9Si4O23(OH)
CuCopper
Cuβ“˜ ChalcopyriteCuFeS2
PbLead
Pbβ“˜ GalenaPbS

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References

Agar, William M. and Earl Emendorfer. (1937): Manganiferous Prochlorite from Hawleyville, Conn., American Journal of Science, 34, pp. 77-80.
Lapham, Davis M. (1957): Epidote from Hawleyville, Connecticut. American Mineralogist. Vol. 42, No. 1-2, pp. 62-72.
Januzzi, Ron E., Seaman, David M. (1976) Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut, USA.
Januzzi, Ronald. E. (1994) Mineral Data Book - Western Connecticut and Environs. Mineralogical Press, Danbury, Connecticut, USA.
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, pp. 397.
www.minsocam.org (n.d.) http://www.minsocam.org/ammin/AM42/AM42_62.pdf
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